Cultivator.



11. E. .MoNAMARA.

. .GULTIVATOB.

APPLIUATIOH FILED JULY 18,1910. I I 986,481 Patented Mar. 14,1911.

2 sums-Burr 1.

um/M00 I Hobart BM? Nan-Lara,

R. E. McNAMARA.

OULTIVATOB. Arrubrnox' rum) JULY 18, 1910.

986,481. Panama Mar.14,19 11.

2 SHEETS-SHEET amvwwtoi RuhartEfMENm-nara,

UNITED STATES PATENT OFFICE.

ROBERT E. MCNAMARA, OF WALLA WALLA, WASHINGTON.

CULTIVATOR.

To all whom it may concern:

Be it known that I, ROBERT E. MONA- MARA, citizen of the United States,residing at Valla Walla, in the county of Walla Walla and State oflWashington, have invented certain new and useful Improvements inCultivators, of which the following is a specification, reference beinghad therein to the accompanying drawing.

This invention relates to cultivators and has special reference to thatclass of cultivators which are dragged over the surface of the ground,and are adapted to cut down roots, weeds and other growth.

The invention has for its object to provide an improved cultivator ofthis kind, which will be effective in operation, and by means of which alarge quantity of weeds and other growth may be cut down.

Referring to the accompanying drawings: Figure 1 is a view inperspective of an improved cultivator constructed in accordance withthis invention. Fig. 2 is a side view thereof showing it in operation.Fig. 3 is a longitudinal section thereof. Fig. 4 is a detail view inperspective of a portion of the frame work of the device.

A cultivator constructed in accordance with this invention consists of anumber of longitudinal runners 1 of suitable length, spaced apart fromeach other, and as here shown preferably connected by means of front andrear strips 2, each consisting of a narrow wooden board or plank securedin any suitable manner to the runners 1, and as here shown, seated insockets 3 in the top of the runners 1 and secured thereto in anysuitable manner, as by means of bolts 4: and nuts 5.

Secured beneath the rear end of the runners 1 are heel runners 6, eachconsisting of a short timber secured to the runners 1 in any suitablemanner, and as here shown preferably by means of bolts 4 and nuts 5,which secure the cross strips 2 to the runners 1. The heel runners 6 arepreferably made of harder wood than the top runners, so as to stand thewear of rubbing on the ground.

Secured transversely to the underside of the heel runners 6 is a knife 7which may be formed of common iron and is about onehalf an inch inthickness by four inches in width, and is provided with a beveled cut-Specification of Letters Patent.

Application filed July 1S, 1910.

Patented Mar. 14, 1911.

Serial No. 572,620.

ting edge 8. The knife 7 is secured to the heel runners 6 by means ofbolts 4: and nuts 5.

Mounted on the top of the cultivator is a platform which, as here shown,preferably consists of a pair of boards 9 extending across the timbers 2and bolted thereto, said boards 9 extending back of the cultivatorseveral feet according to the leverage desired. On the rear of theboards 9, and forming a part of the platform, is a square board 10secured to the boards 9 in any suitable manner on which the driver ofthe cultivator stands, as shown in Fig. 2.

The cultivator is drawn by means of chains 11 having a ring 12 at theirforward end to which a team is attached, and connected at their rear endto a clevis 1S bolted to each of the outside runners 1.

This cultivator works on the leverage principle; that is, it can be runany depth-- from just skimming the top of the soil to a number of inchesbelow the top. This is accomplished by standing on the board 10, at theend of the platform which tilts up the forward part of the cultivatorand causes the rear portion of the cultivator that is to say the heelrunners-to skim over the top of the soilthe knife 7 being tilted up soas not to cut into the soil. The depth to which the knife cuts into thesoil may be adjusted by the person on the platform altering hisposition, so that as he advances toward the front of the platform thecultivator tilts downward, which causes the knife to be tilted downward,and to be drawn downward into the soil. By means of this movement of thecultivator the knife 7 can also be automatically cleaned. As forexample, when the roots, weeds and other growth out off by the knifegather around the top of the same, by the operator stepping ofi theplatform, causes the forward part of the cultivator to drop and the rearpart to be tilted upward. When it is desired to sharpen the knife orreplace it with a new one, it is easily removed by removing the nuts 5and the bolts 4:.

Having described the claim 1. A cultivator of the character described,consisting of a transverse frame having a number of longitudinal runnersspaced apart from each other, heel runners mountinvention, I

ed beneath the rear end of said runners, and means mounted beneath saidframe for cutting Weeds.

2. In a cultivator of the character described, a transverse frame,longitudinal top runners mounted on said frame and spaced apart fromeach other at intervals, a heel runner mounted on the under side of theend of each of said top runners, and

a knife extending transversely beneath andsecured to said heel runners,

3. In a cultivator of the character clescribed, a transverse frame,longitudinal runners mounted at intervals apart on said frame, heelrunners mounted beneath the rear end of said runners, means for cuttingWeeds mounted beneath said runners, and a platform mounted on the top ofsaid frame and projecting rearwardly therefrom.

I. In a cultivator of the character described, a number of longitudinalrunners spaced at intervals apart from each other, transverse barsmounted on the top of said runners and secured thereto, heel runnerseach secured beneath the rear end of the longitudinal runners, a cuttingmeans X tending transversely beneath said heel runners and securedthereto, and a platform 5. In a cultivator of the character demounted onthe top of said transverse bars and projecting rearwardly therefrom.

scribed, a number of longitudinal top runners, each formed with a recessadjacent to its end, transverse bars each seated in said sockets, heelrunners mounted beneath the rear end of each of said top runners, atransverse knife mounted beneath said heel runners, said several partsbeing secured together by bolts and nuts, and a platform mounted on thetop of said transverse bars and projecting rearvvardly therefrom.

6. In a cultivator of the character de scribed, a number of longitudinaltop runners at intervals spaced apart from each other, transverse barssecured to the top of said runners, a heel runner secured to theunderside and at the end of each of said top runners, a transverse knifesecured to the under side of said heel runners, a pair of boards securedto the top of said transverse bars and projecting in the rear of therunners, a platform on the rear end of said boards, and clevises on eachof the outslde top runners and draft chains connected with saidclevlses.

In testimony whereof I hereunto aflix my signature in presence of twoWitnesses.

ROBERT E. MONAMARA.

Witnesses J. G. THOMAS, E. W. OLSON.

Copies of this patent may be obtained for five cents each; by addressingthe Commissioner of Patents, WashingtomDi C.

